1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc. |
4 | * Copyright (c) 2013 Red Hat, Inc. |
5 | * All Rights Reserved. |
6 | */ |
7 | #ifndef __XFS_ATTR_LEAF_H__ |
8 | #define __XFS_ATTR_LEAF_H__ |
9 | |
10 | struct attrlist; |
11 | struct xfs_attr_list_context; |
12 | struct xfs_da_args; |
13 | struct xfs_da_state; |
14 | struct xfs_da_state_blk; |
15 | struct xfs_inode; |
16 | struct xfs_trans; |
17 | |
18 | /* |
19 | * Incore version of the attribute leaf header. |
20 | */ |
21 | struct xfs_attr3_icleaf_hdr { |
22 | uint32_t forw; |
23 | uint32_t back; |
24 | uint16_t magic; |
25 | uint16_t count; |
26 | uint16_t usedbytes; |
27 | /* |
28 | * Firstused is 32-bit here instead of 16-bit like the on-disk variant |
29 | * to support maximum fsb size of 64k without overflow issues throughout |
30 | * the attr code. Instead, the overflow condition is handled on |
31 | * conversion to/from disk. |
32 | */ |
33 | uint32_t firstused; |
34 | __u8 holes; |
35 | struct { |
36 | uint16_t base; |
37 | uint16_t size; |
38 | } freemap[XFS_ATTR_LEAF_MAPSIZE]; |
39 | }; |
40 | |
41 | /*======================================================================== |
42 | * Function prototypes for the kernel. |
43 | *========================================================================*/ |
44 | |
45 | /* |
46 | * Internal routines when attribute fork size < XFS_LITINO(mp). |
47 | */ |
48 | void xfs_attr_shortform_create(struct xfs_da_args *args); |
49 | void xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff); |
50 | int xfs_attr_shortform_getvalue(struct xfs_da_args *args); |
51 | int xfs_attr_shortform_to_leaf(struct xfs_da_args *args); |
52 | int xfs_attr_sf_removename(struct xfs_da_args *args); |
53 | struct xfs_attr_sf_entry *xfs_attr_sf_findname(struct xfs_da_args *args); |
54 | int xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp); |
55 | int xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes); |
56 | xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_attr_sf_hdr *sfp, |
57 | size_t size); |
58 | void xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp); |
59 | |
60 | /* |
61 | * Internal routines when attribute fork size == XFS_LBSIZE(mp). |
62 | */ |
63 | int xfs_attr3_leaf_to_node(struct xfs_da_args *args); |
64 | int xfs_attr3_leaf_to_shortform(struct xfs_buf *bp, |
65 | struct xfs_da_args *args, int forkoff); |
66 | int xfs_attr3_leaf_clearflag(struct xfs_da_args *args); |
67 | int xfs_attr3_leaf_setflag(struct xfs_da_args *args); |
68 | int xfs_attr3_leaf_flipflags(struct xfs_da_args *args); |
69 | |
70 | /* |
71 | * Routines used for growing the Btree. |
72 | */ |
73 | int xfs_attr3_leaf_split(struct xfs_da_state *state, |
74 | struct xfs_da_state_blk *oldblk, |
75 | struct xfs_da_state_blk *newblk); |
76 | int xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf, |
77 | struct xfs_da_args *args); |
78 | int xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args); |
79 | int xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer, |
80 | struct xfs_da_args *args); |
81 | int xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer, |
82 | struct xfs_da_args *args); |
83 | int xfs_attr3_leaf_list_int(struct xfs_buf *bp, |
84 | struct xfs_attr_list_context *context); |
85 | |
86 | /* |
87 | * Routines used for shrinking the Btree. |
88 | */ |
89 | int xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval); |
90 | void xfs_attr3_leaf_unbalance(struct xfs_da_state *state, |
91 | struct xfs_da_state_blk *drop_blk, |
92 | struct xfs_da_state_blk *save_blk); |
93 | /* |
94 | * Utility routines. |
95 | */ |
96 | xfs_dahash_t xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count); |
97 | int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp, |
98 | struct xfs_buf *leaf2_bp); |
99 | int xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local); |
100 | int xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp, |
101 | xfs_dablk_t bno, struct xfs_buf **bpp); |
102 | void xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo, |
103 | struct xfs_attr3_icleaf_hdr *to, |
104 | struct xfs_attr_leafblock *from); |
105 | void xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo, |
106 | struct xfs_attr_leafblock *to, |
107 | struct xfs_attr3_icleaf_hdr *from); |
108 | |
109 | #endif /* __XFS_ATTR_LEAF_H__ */ |
110 | |